Chitty 1926, p. 250; Thom, Thom & Burl 1980, p. 27. Chitty, Lily F. (1926). "The Hoar Stone or Marsh Pool Circle"(PDF). Transactions of the Shropshire Archaeological Society and Natural History. 10: 247–53. Thom, Alexander; Thom, Archibald Stevenson; Burl, Aubrey (1980). Megalithic Rings: Plans and Data for 229 Monuments in Britain. BAR British Series 81. Oxford: British Archaeological Reports. ISBN0-86054-094-4.
Chitty 1926, p. 247; Thom, Thom & Burl 1980, p. 27; Burl 2005, p. 74. Chitty, Lily F. (1926). "The Hoar Stone or Marsh Pool Circle"(PDF). Transactions of the Shropshire Archaeological Society and Natural History. 10: 247–53. Thom, Alexander; Thom, Archibald Stevenson; Burl, Aubrey (1980). Megalithic Rings: Plans and Data for 229 Monuments in Britain. BAR British Series 81. Oxford: British Archaeological Reports. ISBN0-86054-094-4. Burl, Aubrey (2005). A Guide to the Stone Circles of Britain, Ireland and Brittany. New Haven and London: Yale University Press. ISBN978-0-300-11406-5.